Process of disinfection.



No. 855,942. PATENTED JUNE 4, 1907.

F. DURET. PROCESS 0F DISINPBCTION.

APPLICATION FILED HAY 21. 1906.

2 16 4M I I QZu/IM fl w) v rssncois nunn'r, or rears, FRANCE.

Msinreoi'iow.

specification of Letters Patent.

Patented dune d, 1907.

Application filed Yziey 21,1908- Sarial No- 317.85.9-

To all whom it may concern:

Be it known that I, FRANCOIS DURET, a citizen of the Frenchltepublic, and a resident of Paris, France, have invented certain new and useful lin provements in Processes of Disinfection, of which the following is a specification. a

My new and improved process ofdisinfection is based essentially on the combination of the successive action on the goods to be disinfected of dry heat, then of steam with a slight addition of a specialantiseptic and thereafter of the vapor of said antiseptic alone, in a closed heating chamber, under certain conditions of temperature and during a period varying according to the size of the disinfecting chamber.

The disinfecting liquid employed by me, in carrying out my improved process of disinfection, is composed of a mixture of two (2) parts of formic aldehyde, one (1) part oi ethylic aldehyde and a very slight addition of cosine; the mixture so formed is known in the trade by the name of aldeol.

In the accompanying drawing; forming a I art of this specification, l have shown a form of apparatus for carrying out my improved process of disinfection. Figure 1,

- showing a front view in elevation with the front wall or door removed of such apparatus, and Fig 2 showing a top plan view of the stove or device by which the disinfecting chamber is heated and-the disinfecting fluid vaporized and fed to the same.

The disinfecting box or chamber 6 is usually of such size as to be readily supported upon suitable horses, as shown in Fig. is rectangular in shape and provided with grating shelves (1 to support the articles to be disinfooted, and in order to retain the heat, the walls on all sides are suitably insulated. A double wall of sheet steel with a closed air space of a few centimeters. answers the purpose or said space may be filled with any suitable insulating material.

The flooring of the chamber 7; is preferably provided with a central circular hole for the passage and support of the heating apparatus, and disinfector vaporizer, which consists of a cylinder 0 from the periphery of the whole placed over a suitable heating de-; vice, for instance a lamp it having multiple ets and surrounded by a perforated drum Q1.

A vent c'which may be closed at is pro vided at a suitable point in the upper part of the chamber 5.

The upper end of the cylinder cforms a dish f into'which the li rid to be vaporized may be conveyed throng a pipe 9.

he form, dimensions and mode of construction of the chamber and heater may be varied at will, the essential point being that during the desired time such chamber can be hermetically closed and that the walls allow the temperature, required for successfully carrying out the disinfection process, to be maintained for a considerable period.

, To carry out my improved process of disinfection, the articles to be disinfected are placed on the shelves, the chamber 1) is closed caving open the vent k and the chamber is. heated until the thermometer indicates (3., whereupon the vent Fr is closed. Aimix ture of water and 5% of the disinfecting fluid before described is then conveyed through pipe 9 into the dish or receptacle and at the end of suflicient time to thoroug ly vaporize the mixture of water'and disinfecting fluid, usually about '10 minutes, a quantity of such disinfecting fluid in its full strength, sufficient when vaporized thoroughly to fill the chamber with its vapors is introduced through pipe g. The stove or heater is then he t in action for about two hours, during Wl'lld the temperature must be maintained above 80 (L, (say between 80 and C.) After the expiration of this time the disinfection is absolute and the articles treated undergo no de- 1 terioration. Having now I claim is:

l. The hereinbefore described process of disinfection which consists in subjecting the described my invention what articles to be disinfected in a chamber first to l l l l i l the action of dry heat, second to the action of vapors of a mixture of water, formic aldehydeand ethylic aldehyde with a very slight addition of cosine and third to action of vaors of pure formic aldehyde, ethylic aldeliyde and a slight addition of cosine substanwhich pipes d perforated with holes (2 radiate, tially as described.

Q ses m 2. The hereinbefore described process of clisii'ifection, Which consists in subjecting the articles to be disinfected in a chamber first to the action of dry heat, second of the vapors of a mixture of water and 5% of a disinfecting fluid composed of formic aldehyde, ethylic eldehydeesid e very slight addition of cosine and third to the Vapors of pure formic elder l yde, cthylic aldehyde ssliglifaddition.

In testimony whereof I affix my signature in presence of two Witnesses.

FRANCOIS DURET.

Witnesses i VIoTcR' NATRAU,

AUcUsTUs E. INGRAM. 

